Add share activity

app/src/main/AndroidManifest.xml

@@ -45,6 +45,15 @@
             android:name=".settings.SettingsActivity"
             android:theme="@style/AppTheme.NoActionBar"
             android:label="@string/title_activity_settings" />
+        <activity
+            android:name=".sharing.ShareActivity"
+            android:theme="@android:style/Theme.Translucent.NoTitleBar">
+            <intent-filter>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="text/plain" />
+            </intent-filter>
+        </activity>
 
         <service android:name=".service.WebSocketService" />
 
@@ -55,4 +64,4 @@
         </receiver>
     </application>
 
-</manifest>
+</manifest>